<!DOCTYPE html>
<html lang="en">
<head>

    <title>Title</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <!--<script src="assets/js/vconsole.min.js"></script>-->
</head>
<body >

<div style="width: 80%; margin: 0 auto;">
<!--    <button id="begin">开始</button>-->
    <button id="record" disabled>录制</button>
   <button id="play" disabled>播放</button>
    <button id="download" disabled>下载</button>
    <button id="reStart" disabled>重新开始</button>
<!--    <button id="upload">上传</button>-->
</div>
<video id="gum", playsinline="" webkit-playsinline="" preload="none" width="30%" height="30%"  data-setup="{}" autoplay="autoplay"></video>
<video id="recorded", playsinline="" webkit-playsinline="" preload="none" width="30%" height="30%"  data-setup="{}" autoplay="autoplay"></video>
<p id="status", style="text-align: center;width: 402px;"></p>
<script>
   // new VConsole()
    //  var mediaSource = new MediaSource();  //打开电脑摄像头
    // mediaSource.addEventListener('sourceopen', handleSourceOpen, false);
    var mediaRecorder ;
    var recordedBlobs;
    var sourceBuffer;
    var littleVideo = false;

    var gumVideo = document.querySelector("#gum");  //把图像显示在video上
    var statusV = document.getElementById("status"); //显示状态信息
    var recordedVideo = document.querySelector("video#recorded");
    statusV.innerText = '准备阶段';

    // var beginButton = document.querySelector("button#begin");
    var recordButton = document.querySelector("button#record");
    var playButton = document.querySelector("button#play");
    var downloadButton = document.querySelector("button#download");
    var reStartButton = document.querySelector("button#reStart");
    var uploadBtn = document.querySelector("button#upload");


    recordButton.onclick = toggleRecording;
    playButton.onclick = play;
    downloadButton.onclick = download;
    reStartButton.onclick = restartRecord;



    var constraints = {
        audio: true,
        video: true
    };


    function handleSuccess(stream) {
        recordButton.disabled = false;
        console.log("getUserMedia() got stream: ", stream);
        window.stream = stream;
        if (window.URL) {
            //gumVideo.src = window.URL.createObjectURL(stream);
            gumVideo.srcObject = stream;
        } else {
            gumVideo.src = stream;
        }



        gumVideo.addEventListener('pause',function() {if(i){window.clearInterval(i);}},false);
        gumVideo.addEventListener('ended',function() {if(i){clearInterval(i);}},false);
    }

    function handleError(error) {
        console.log("navigator.getUserMedia error: ", error);
    }

    navigator.mediaDevices.getUserMedia(constraints).  //打开摄像头
    then(handleSuccess).catch(handleError);



    recordedVideo.addEventListener('error', function(ev) {
        console.error('MediaRecording.recordedMedia.error()');
        alert('Your browser can not play\n\n' + recordedVideo.src
            + '\n\n media clip. event: ' + JSON.stringify(ev));
    }, true);

    function handleDataAvailable(event) {
        if (event.data && event.data.size > 0) {
            recordedBlobs.push(event.data);
        }
    }

    function handleStop(event) {
        console.log("Recorder stopped: ", event);
    }

    function toggleRecording() {
        if (recordButton.textContent === '录制' || recordButton.textContent === '重录') {
            littleVideo = false;
            startRecording();
        } else {
            stopRecording();
            recordButton.textContent = '重录';
             playButton.disabled = false;
            downloadButton.disabled = false;
            reStartButton.disabled = false;
        }
    }

    function startRecording() {
        statusV.innerText = '开始录制';
        //todo：显示录制中 提示
        recordedBlobs = [];
        var options = {mimeType: 'video/webm;codecs=vp9'};
        if (!MediaRecorder.isTypeSupported(options.mimeType)) {
            console.log(options.mimeType + ' is not Supported');
            options = {mimeType: 'video/webm;codecs=vp8'};
            if (!MediaRecorder.isTypeSupported(options.mimeType)) {
                console.log(options.mimeType + ' is not Supported');
                options = {mimeType: 'video/webm'};
                if (!MediaRecorder.isTypeSupported(options.mimeType)) {
                    console.log(options.mimeType + ' is not Supported');
                    options = {mimeType: ''};
                }
            }
        }
        try {
            mediaRecorder = new MediaRecorder(window.stream, options);
        } catch (e) {
            console.error('Exception while creating MediaRecorder: ' + e);
            alert('Exception while creating MediaRecorder: '
                + e + '. mimeType: ' + options.mimeType);
            return;
        }
        // console.log('Created MediaRecorder', mediaRecorder, 'with options', options);
        recordButton.textContent = '停止';
        playButton.disabled = true;
        downloadButton.disabled = true;
        reStartButton.disabled = true;
        mediaRecorder.onstop = handleStop;
        mediaRecorder.ondataavailable = handleDataAvailable;
        mediaRecorder.start(10); // collect 10ms of data
        // console.log('MediaRecorder started', mediaRecorder);
    }

    function stopRecording() {
        statusV.innerText = '停止录像';
        //影藏录制中提
        mediaRecorder.stop();
        console.log('Recorded Blobs: ', recordedBlobs);
        recordedVideo.controls = true;
    }

    function play() {
        var superBuffer = new Blob(recordedBlobs, {type: 'video/mp4'});
        recordedVideo.src = window.URL.createObjectURL(superBuffer);
        //gumVideo.src = window.URL.createObjectURL(superBuffer);
    }

    function download() {
        var blob = new Blob(recordedBlobs, {type: 'video/mp4'});
        var url = window.URL.createObjectURL(blob);
        var a = document.createElement('a');
        a.style.display = 'none';
        a.href = url;
        //文件名 通过方法传进来 检测是否合法？
        a.download = '视频录像.mp4';
        document.body.appendChild(a);
        a.click();
        setTimeout(function() {
            document.body.removeChild(a);
            window.URL.revokeObjectURL(url);
        }, 100);
    }


    function upload(){
        formData.append('nickName','Jack');//-->后台用req.body.nickName将值'Jack'取出
        var blob = new Blob(recordedBlobs, {type: 'video/mp4'});
        // var data = new FormData();
        var data = new FormData();
        data.append('file', file);
        return uploadVideoFile(data).then(res => {
            return this.recordVideoUrl = res.url;//获取上传的视频地址
        })
        // data.append('video', blob);
        // data.append('qw', 123);
        // data.append('question', 1);
        // var formData = new FormData();
        //
        // formData.append("username", "Groucho");
        // formData.append("accountnum", 123456); // 数字 123456 会被立即转换成字符串 "123456"
        //
        // // JavaScript file-like 对象
        // var content = '<a id="a"><b id="b">hey!</b></a>';
        // var blob = new Blob([content], { type: "text/xml"});
        //
        // formData.append("webmasterfile", blob);
        //
        // console.log(formData);

        $.ajax({
            type: "POST",
            url: "/form/data",
            data: data,
            processData:false,   //  告诉jquery不要处理发送的数据
            contentType:false,    // 告诉jquery不要设置content-Type请求头
            success:function(msg){
                console.log(msg);
            }
        });
    }

    function restartRecord(){
        //清楚存留 按钮功能重置
        recordButton.textContent = '录制';
        playButton.disabled = true;
        downloadButton.disabled = true;
        reStartButton.disabled = true;
        //handleSuccess();
        navigator.mediaDevices.getUserMedia(constraints).
        then(handleSuccess).catch(handleError);
        // statusV.innerText = '准备阶段';
    }
</script>
</body>
</html>
